I agree with everything you wrote. The author expected the "senior" title but the complaints in the article don't come across as experienced senior developer.

I agree with everything you wrote. The author expected the "senior" title but the complaints in the article don't come across as experienced senior developer. It's a shame that FAANG companies, and those that emulate FAANG hiring practices, put so much emphasis on specific languages and algorithms, since those actually have very little to do with success as a developer, or adding value to the business. I understand the gatekeeping function of those hiring practices but I think it just reinforces a monoculture and tunnel vision focus on details. If Shopify told the author one thing then assigned something else that's a problem. One person might see an opportunity, another might interpret that as deception or poor management. I don't know what the author did about it. I would have discussed with my manager and tried to sort out the difference between my expectations (according to the job description and hiring process) and what actually happened. Some of my luckiest career breaks came from getting hired for A and ending up doing X. I even got sent to the wrong interviews once (by a FAANG company HR rep) and got a much better job than the one I was originally picked to interview for.